21396 results about "Clean water" patented technology

A method and plant for the treatment of an organic waste material in liquid form, e.g. liquid manure from livestock, the method comprising filtering fibres and particles from the liquid, subjecting the liquid to anaerobic fermentation in a biogas reactor, separating a substantially sterile and particle-free permeate stream from the biogas reactor, e.g. using ultrafiltration, subjecting the permeate stream to treatment with an ammonia stripper at an elevated temperature and preferably at reduced pressure to remove substantially all ammonia and carbon dioxide and to result in an ammonia fraction and a nutrient salt fraction, and separating the nutrient salt fraction into a fertiliser concentrate fraction and a water fraction, e.g. using reverse osmosis. The end products of the method are clean water, ammonia concentrate, fertiliser concentrate containing salts of P and K, compost and high-quality biogas with a high methane content.

The invention discloses a device and method for preparing nitrogen foam cement. The preparing device comprises a foam cement producer, a liquid nitrogen evaporator, a liquid nitrogen plunger pump, a foam liquid plunger pump, a foam liquid tank, a heat exchange system, a liquid nitrogen pipeline, a high-pressure cement paste pipeline, a first pipeline, a foam cement discharge pipeline and a densitydetecting device. The heat generated by a power unit, a hydraulic system and other devices in a nitrogen foam well fixing device is recovered through the heat exchange system, the recovered heat is used as a heat source of the liquid nitrogen evaporator, energy conservation and environment protection are realized, the energy utilization rate is high, and equipment input is low. Liquid nitrogen and foam liquid are pressurized through a high-pressure liquid nitrogen plunger pump and a high-pressure foam liquid plunger pump, the mixing uniformity is increased, and the density of foam cement is reduced. The density of the foam cement is detected in real time through the density detecting device, the flow of the liquid nitrogen and/or foam liquid is adjusted according to the density, and the density is simply controlled. By arranging a clear water tank, after operation ends, the equipment and pipelines are flushed, and the service life is polonged.

The invention relates to a fracturing fluid and sand mixing semitrailer, and belongs to the field of fracturing devices for oil field work. The fracturing fluid and sand mixing semitrailer comprises a semitrailer body, a hydraulic system and an electrical control system. The hydraulic system comprises a hydraulic oil tank, at least one hydraulic pump and a hydraulic multi-way valve. An engine, the hydraulic system, the electrical control system, a lifting control chamber, a spiral conveyor, a clean water suction centrifugal pump, a fracturing fluid suction centrifugal pump, a stirring machine, a discharge centrifugal pump, a liquid adding pump, a dry powder adding device and a concentrated guanidine gum adding pump are integrated on the semitrailer body. The work steps of conducting glue solution mixing after fracturing liquid mixing is conducted and discharging the glue solution to a downward fracturing device can be conducted by operating the electrical control system to drive the hydraulic pump through an operator, and therefore work steps of oil field work are highly integrated, matched devices are reduced, workloads of working staff are reduced, and construction quality is ensured.

The invention provides a surface protection process used for long-time corrosion prevention and rust prevention. The process comprises the following process flow: sandblasting: performing surface blasting of brown steel shot on a valve body after heat treatment; pretreatment: cleaning to remove impurities such as oil stains, oxides, or water scales on the surface of the valve body by utilizing analkaline cleaning liquid; cleaning: rinsing chemical substances remaining on the surface of the valve body with clean water; plating solution preparation: preparing a plating solution according to a ratio of 5% to 14% of phosphorus content; preheating: putting the valve body in hot water to be preheated so that the temperature of a workpiece is close to the temperature of the plating solution; plating: putting the preheated workpiece into the plating solution for plating; treatment after plating: after the plating is completed, cleaning, air drying and storing the workpiece sequentially withinone hour. The surface protection process provided by the invention can delay the premature rust and corrosion of the valve body in the use process, and prolong the service life of the valve body to 20 to 30 hours.

The invention discloses a washing machine control method and a washing machine. The washing machine is provided with a turbidity sensor for detecting water turbidity and a conductivity sensor for detecting water conductivity. According to the washing machine control method, conductivity of clear water is detected before washing is carried out, conductivity and a turbidity value of rinsing water are detected at the same time at every rinsing stage after washing is carried out, a conductivity variable quantity is calculated according to the measured conductivity of clear water and conductivity of rinsing water, and rinsing is stopped when the turbidity value and the conductivity variable quantity are both lower than the corresponding set threshold value. During every rinsing, the washing machine can automatically detect and calculate turbidity of rinsing water and conductivity changes of rinsing water, judge whether clothes are rinsed clean according to turbidity and conductivity changes of rinsing water and stop working in time after the clothes are rinsed clean to save water and electricity. The washing machine can automatically add rinsing frequency if the washing machine detects that the clothes are not rinsed clean when the rinsing frequency reaches the set value, so that residual stains, detergents and softeners are reduced, and the purpose of healthy laundry is achieved.

A two-step chemical precipitation process involving hydroxide precipitation and sulfide precipitation combined with “field separation ” technology such as magnetic separation, dissolved air flotation, vortex separation, or expanded plastics flotation, effectively removes chelated and non-chelated heavy metal precipitates and other fine particles from water. In the first-step, the non-chelated heavy metals are precipitated as hydroxides and removed from the water by a conventional liquid/solids separator such as an inclined plate clarifier to remove a large percentage of the dissolved heavy metals. The cleaned water is then treated in a second precipitation step to remove the residual heavy metals to meet discharge limits. In the second precipitation step, any metal precipitant more effective than hydroxide for metal precipitation can be used. The invention improves metal removal, lowers cost because fewer chemicals are used, produces less sludge, and reduces the discharge of toxic metals and metal precipitants to the environment. Magnetic separation is preferred for the separation of particles precipitated in the second stage. Similar methods can be employed for separation of other particulates from water. Particulates can also be removed by causing them to adhere to particles of expanded plastic, forming a floc lighter than water, so that the floc can be removed by flotation.

The invention relates to a high-efficiency oil-based flushing spacer liquid. The flushing spacer liquid is prepared from the following components in parts by weight: 100 parts of clear water, 1.0-1.5 parts of a surfactant, 4.0-5.0 parts of a chelating agent, 2.0-4.0 parts of a suspension stabilizer, 0.6-0.8 part of a tackifier, 0.5-0.75 part of a viscosity enhancer, 25-15 parts of a weighting agent, 1.0-5.0 parts of a pH regulator, and 0.2-0.4 part of a defoaming agent. The invention provides a special high-efficiency flushing spacer liquid for oil-based drilling fluid, which has dual functions of flushing and spacing, is high in flushing efficiency, wide in density adjusting range and good in suspension stability, and can effectively improve the conditions of interfacial cementation and improve the quality of well cementation.

The invention provides a preparation method of triazine structure containing benzoxazine intermediate, which sequentially includes: (1) performing synthetic reaction of aldehyde compound and amine compound at a molar ratio of at least 1:1 which includes adding aldehyde compound and solvent of at least one of clean water, methanol, ethanol, isopropanol, and ethyl acetate into a reactor at the room temperature under the normal pressure to obtain mixed solution with aldehyde mass concentration of no greater than 95%, adding amine compound while stirring, and reacting at 0-100 DEG C under the normal pressure for at least 15 minutes to obtain the reactant liquor; (2) pouring into the cleaning solution, stirring and cleaning, and filtering to collect solid substance, or directly filtering the reactant liquor to collect the solid substance; and (3) drying the solid substance obtained in step (2) at 30-100 DEG C.

An object of the present invention is to provide a water purification cartridge in which the decreased function of the hollow fiber membranes is restored by cleaning and of which the operating cost of a purification treatment of raw water decreases. The present invention provides a water purification cartridge comprising a hollow fiber membrane element comprising a plurality of hollow fiber membranes bent in a U-shape and a potting material for binding both ends of the hollow fiber membranes so as to maintain the open states of the hollow fiber membranes and a cylindrical hollow fiber membrane case for covering the hollow fiber membranes, wherein the hollow fiber membrane element is detachably installed in the hollow fiber membrane case so that a fluid-tight state is maintained between the primary side and the secondary side of the hollow fiber membranes.

A food cleaning device comprises a cleaning water tank, a water pump and an electrolyzed water generator all provided with water inlets and water outlets and connected to form a closed circulation loop by pipelines. An ultrasonic transducer is provided in the water tank. Food can be cleaned safely and effectively by the inventive device with disinfection and pesticide residue removing functions. The invention is provided with advantages of time saving, labor saving, water saving, high cleaning ratio, and body health benefiting, thereby the invention is capable of being widely used by household, school, mess hall, catering industry and vegetable cleaning industry.

A nutritive mixed feed without environmental pollution for culturing aquatic animals is prepared from microecological preparation, Chinese-medicinal preparation, enzyme preparation, micropeptide preparation, and the adsorbent of waste N and P. It has high effect to clean water, provide nutrients and prevent and treat diseases.

A two-step chemical precipitation process involving hydroxide precipitation and sulfide precipitation combined with “field separation” technology such as magnetic separation, dissolved air flotation, vortex separation or expanded plastics flotation, effectively removes chelated and non-chelated heavy metal precipitates and other fine particles from water. In the first-step, the non-chelated heavy metals are precipitated as hydroxides and removed from the water by a conventional liquid/solids separator such as an inclined plate clarifier to remove a large percentage of the dissolved heavy metals. The cleaned water is then treated in a second precipitation step to remove the residual heavy metals to meet discharge limits. In the second precipitation step, any metal precipitant more effective than hydroxide for metal precipitation can be used. The invention improves metal removal, lowers cost because fewer chemicals are used, produces less sludge, and reduces the discharge of toxic metals and metal precipitants to the environment.

The invention provides an integrated internal circulation type denitrification and decarburization bio-membrane reactor and an operating method thereof. The main body of the reactor consists of an anoxic zone on the lower part, an aerobic zone on the upper part and a settling zone on the periphery of the aerobic zone; a composite filler is filled in the anoxic zone, and a water inlet pipe is communicated with the bottom of the anoxic zone; the aerobic zone is partitioned into a filler zone for adding a carrier on the upper part and a mud-water mixing zone on the lower part by adopting an orifice plate, the anoxic zone and the aerobic zone are partitioned through an impermeable partition plate, and a plurality of aeration pipes are arranged at the bottom of the aerobic zone and provided with air inlet pores; and the settling zone consists of three parts, namely a clean water zone, a contact settling zone and a sludge returning zone which are sequentially arranged from top to bottom, wherein the bottom of the sludge returning zone is provided with a sludge returning seam and communicated with the bottom of the aerobic zone. The reactor realizes zero power consumption in sludge returning, and is compact in structure; and a back flushing system is not required in the contact settling zone, and additional agents and carbon sources are not required, so that the reactor is low in running cost.

The invention discloses a cleaning robot base station. A water inlet and outlet device which injects water into a cleaning box stopped in a robot and recycling sewage of a sewage box in the robot is arranged inside the base station. The invention further discloses a robot system. The system comprises a robot body and the base station, the robot body comprises the clean water box and the sewage box, the base station allows the robot body to be stopped, and the water inlet and outlet device which injects water into the cleaning box stopped in the robot body and recycling sewage of the sewage boxin the robot body is arranged inside the base station. According to the cleaning robot system, by automatically connecting the robot with the base station, clean water is added or sewage is poured out, and complex manual operation is omitted.

The invention discloses a preparation method for a carbon nanomaterial enhanced aluminum base composite material, which is similar to a powder metallurgy method, i.e. an aluminum material cladding powder processing and forming method. The preparation method is mainly used for solving the problem of precise mould requirement in the powder metallurgy process. The method is realized by the following steps of: 1) carrying out annealing treatment to pure aluminum or aluminum alloy material, carrying out alkali liquor cleaning and clean water cleaning to the surface of the pure aluminum or aluminum alloy material, and airing or drying after cleaning; 2) fully mixing and evenly stirring the pure aluminum or aluminum alloy powder with carbon nanomaterial at a certain ratio, i.e. at the mass fraction of the carbon nanomaterial of 0.1-8%; 3) cladding mixed powder by the pure aluminum or aluminum alloy material processed in step 1, compacting, sealing, and pressing into a precast block by a press; and 4) rolling the precast block obtained in step 3 into a final finished product. The preparation method for the carbon nanomaterial enhanced aluminum base composite material, which is disclosed by the invention, has the advantages of low cost, short flow, simpleness in operation and easiness in realizing industrialization.

A system and method for restoring the natural water cycle by reducing stormwater runoff and addressing issues affecting groundwater supply. In one embodiment of the invention, the system comprises a roof washer component, cistern component, pump, and manufactured dry well. The system is designed to divert polluted rooftop runoff, capture clean rooftop runoff and store this clean water for irrigation purposes and nonpotable uses, while infiltrating excess water to recharge groundwater supplies thereby replicating the natural hydrologic cycle.

An electric sweeping washing device includes a sweeping washing brush and a water collection system design. The sweeping washing brush includes a body; a sweeping roller brush disposed anteriorly at the body; and a dust collecting box for raking dust; a water absorbing scrubbing roller brush disposed posteriorly at the body; a sprinkler head; and a water absorbing scraper for absorbing water from the water absorbing scrubbing roller brush and raking dirty water. The water collection system design includes a tank divided into a clean water chamber and the dirty water chamber, wherein the sprinkler head, the clean and dirty water chambers, a water absorbing scraper, and the dust collecting box are connected via tubes; a spray motor for withdrawing clean water from the clean water chamber and delivering it to the sprinkler head; and an air intake motor for providing vacuum pressure to the dirty water chamber.

The invention provides a manufacture process of compound grain, which comprises the steps that coarse cereals are added into rice, or coarse cereal powder is added into flour, wherein before the coarse cereals are added into the rice or the coarse cereal powder is added into the flour, the coarse cereals are pretreated, and the pretreatment process comprises the following steps that: firstly, the coarse cereals are cleaned, then, 12.5 percent of edible alcohol (95 degrees) is added into clean water with the temperature being 50 to 55 DEG C, the coarse cereals are soaked for 3.5hours and are then dried in the air, next, liquid formed by mixing clean water with the temperature being 85 to 90 DEG C with 6.7 percent of white vinegar is used for spraying and soaking the coarse cereals for 11hours, and then, the coarse cereals are dried, hulled and crushed into particles or fine powder. The coarse cereals and the rice or the coarse cereal powder and the flour in the compound grain can be simultaneously cooked through boiling, the mouth feeling is good, the flavor is good, and in addition, the nutrition is balanced.

A system and method for treating and removing hydrocarbon and other contaminants in bilge and ballast water, utilizing a multiple progressive process that chemically and electrically treats-and removes contaminants. Wastewater, received by a sump, is transmitted to a holding tank and treated, over a period of time while-influent wastewater continues off loading. The wastewater is pumped to an oil/water separator tank that decants free-floating oil from the wastewater to an oil retention tank. The wastewater then undergoes an electrocoagulation process where emulsions are broken and compounds that further aid treatment are created. The treated water flows to a retention/separation tank where contaminant particles coalesce and separate. Water is decanted and transferred to a clean water holding tank through an ozone injection system and an activated carbon filter. Treated water is recirculated until it exits the system meeting discharge limits for organics and metals allowing release into the environment.

The invention discloses a medical device sterilizing device, comprising a box body, a sterilizing cleaning cylinder, a motor, a transmission shaft, a first gear, an outer gear ring, a disc, a movable rod, a filter screen, a hollow rotating shaft, a brush, a spray hole, A transmission mechanism, a water inlet hose, a nozzle and a liquid inlet pipe, the transmission mechanism includes a mounting plate, a second gear and a rack, the present invention is provided with a motor, a transmission shaft, a first gear and an external gear ring, and the above components cooperate with each other. Evenly spray and disinfect medical equipment to avoid wasting disinfectant. It is equipped with a disc, a movable rod, a mounting plate, a second gear and a rack, which drives the hollow shaft to move left and right, and the hollow shaft drives the brush on it to move left and right, increasing the number of brushes. At the same time, the brush is constantly reversing, and the medical equipment is continuously brushed, which can remove the stubborn stains on the surface of the medical equipment and improve the disinfection efficiency. Rinse off the disinfectant on the surface, and the cleaning effect is good.